CN116025857A - Natural gas pipeline fault monitoring device and method - Google Patents
Natural gas pipeline fault monitoring device and method Download PDFInfo
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- CN116025857A CN116025857A CN202310116696.3A CN202310116696A CN116025857A CN 116025857 A CN116025857 A CN 116025857A CN 202310116696 A CN202310116696 A CN 202310116696A CN 116025857 A CN116025857 A CN 116025857A
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 160
- 239000003345 natural gas Substances 0.000 title claims abstract description 80
- 238000012806 monitoring device Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 25
- 230000002159 abnormal effect Effects 0.000 claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims abstract description 22
- 238000004891 communication Methods 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims abstract description 5
- 238000009530 blood pressure measurement Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims 2
- 238000001514 detection method Methods 0.000 abstract description 9
- 238000007689 inspection Methods 0.000 abstract description 5
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The invention relates to the field of natural gas pipeline fault monitoring, and discloses a natural gas pipeline fault monitoring device and a natural gas pipeline fault monitoring method, wherein the technical scheme is characterized by comprising the following steps: the gas pressure measuring assembly is placed in the natural gas pipeline to be detected, the wireless remote transmission assembly is installed outside the natural gas pipeline to be detected, the wireless remote transmission assembly is in wireless connection with the gas pressure measuring assembly, whether the gas pressure value of the natural gas at a plurality of sections in the pipeline is abnormal or not is measured through the gas pressure measuring assembly, the wireless remote transmission assembly is used for receiving abnormal pressure data existing in measurement, fault alarm information, fault positioning coordinates and fault site pipeline pictures are sent to the pipeline monitoring station through the satellite communication link, manual timing inspection is not needed, detection efficiency is improved, personnel labor force is reduced, real-time monitoring can be conducted on the natural gas pipeline, and the phenomenon that workers cannot know in time when the natural gas leaks is avoided.
Description
Technical Field
The invention relates to the field of natural gas pipeline fault monitoring, in particular to a natural gas pipeline fault monitoring device and method.
Background
The natural gas pipeline transportation is to assemble a plurality of sections of pipelines by using flanges, and carry out uninterrupted transportation on natural gas through the natural gas pipelines; in the process of natural gas pipeline transportation, in order to prevent leakage, the safety detection of pipeline leakage needs to be carried out regularly;
traditional detection method is artifical regularly to patrol and examine under most circumstances, and this inspection mode often detection efficiency is low, added personnel's labour, and can't carry out real-time supervision to natural gas pipeline, leads to the natural gas to know in time when leaking the staff.
Therefore, the invention provides a natural gas pipeline fault monitoring device and a natural gas pipeline fault monitoring method, and the technical problems are improved.
Disclosure of Invention
The invention aims to provide a natural gas pipeline fault monitoring device and method, which solve the problems that the traditional detection method is manual timing inspection in most cases, the inspection mode is low in detection efficiency, personnel labor force is added, and the natural gas pipeline cannot be monitored in real time, so that workers cannot know the natural gas in time when the natural gas leaks.
The technical aim of the invention is realized by the following technical scheme: a natural gas pipeline fault monitoring device and method, the device comprising:
the gas pressure measuring component is placed in a natural gas pipeline to be detected and is used for measuring whether the gas pressure value of the natural gas at a plurality of sections in the pipeline is abnormal or not;
the wireless remote transmission assembly is arranged outside a natural gas pipeline to be detected, is in wireless connection with the air pressure measurement assembly, and is used for receiving abnormal pressure data existing in measurement, and sending fault alarm information, fault positioning coordinates and fault site pipeline pictures to a pipeline monitoring station through a satellite communication link;
the detection method using the natural gas pipeline fault monitoring device comprises the following steps:
s1, placing an air pressure measurement assembly in a natural gas pipeline, and connecting the air pressure measurement assembly in the pipeline with a wireless remote transmission assembly outside the pipeline by WIFI;
s2, the air pressure measuring component transmits the abnormal value of the natural air pressure to the wireless remote transmission component through a WIFI signal;
s3, acquiring coordinate information of the pressure abnormal point in real time by a Beidou positioning module carried by the wireless remote transmission assembly;
s4, the wireless remote transmission assembly sends out fault alarm information, fault positioning coordinates and fault site pipeline pictures to a pipeline monitoring station through a satellite communication link;
and S5, after the pipeline monitoring station receives the alarm information and the pipeline field picture, selecting an application and wireless remote transmission assembly to establish a video link, and observing the fault dynamics of the pipeline in real time.
As a preferred embodiment of the present invention, the air pressure measuring assembly includes: an umbrella-shaped supporting frame formed by a plurality of brackets, wherein sealing films are adhered to the surfaces of two sides of the umbrella-shaped supporting frame;
and the sensor, the WIFI chip, the WIFI antenna and the battery are arranged in the bracket.
As a preferred embodiment of the present invention, the pressure anomaly value is calculated by the following three equations:
the continuous equation of natural gas velocity and pipeline length is:
；
the transfer momentum equation for natural gas is:
；
the equation for the state of natural gas pressure is:
；
wherein ,
the length of the pipeline is q, the gas density, v, the gas speed, Y, the natural gas pressure, A, the resistance density caused by the bending degree of the pipeline, r, the inner diameter of the natural gas pipeline, h, the gas constant and T, the gas temperature.
As a preferred technical solution of the present invention, the wireless remote transmission assembly includes: a plurality of ultra-light satellite portable stations and a plurality of video acquisition cameras which are arranged on the outer wall of the pipeline;
and a plurality of ultra-light satellite portable stations are internally provided with a Beidou positioning module and a WIFI access module.
As a preferred embodiment of the present invention, a plurality of the ultra-light satellite portable stations are installed at a spacing distance of 20-30m.
As a preferable technical scheme of the invention, the interval distance between the video acquisition cameras is 50-60m.
As a preferable technical scheme of the invention, the video acquisition camera and the ultra-light satellite portable station are interconnected through the WIFI access module network.
In summary, the invention has the following beneficial effects: firstly, whether the air pressure value of the natural gas at a plurality of sections in the pipeline is abnormal or not is measured through the air pressure measuring assembly, then the wireless remote transmission assembly is used for receiving abnormal pressure data existing in measurement, and fault alarm information, fault positioning coordinates and fault site pipeline pictures are sent to the pipeline monitoring station through the satellite communication link, so that manual timing inspection is not needed, the detection efficiency is improved, the personnel labor force is reduced, the natural gas pipeline can be monitored in real time, and the phenomenon that the staff cannot know the natural gas in time when the natural gas leaks is avoided.
Drawings
FIG. 1 is a schematic diagram of a detection method according to the present invention;
FIG. 2 is a front perspective view of the umbrella-shaped support frame of the present invention;
FIG. 3 is a front view of an umbrella-shaped support frame of the present invention;
FIG. 4 is a rear perspective view of the umbrella-shaped support frame of the present invention;
FIG. 5 is a cross-sectional view of an umbrella-shaped support frame of the present invention;
FIG. 6 is an enlarged view of a portion of the invention at A in FIG. 5;
FIG. 7 is a schematic diagram of the installation of a wireless telemetry module of the present invention;
in the figure: umbrella-shaped braced frame 11, support 12, sealing membrane 13, sensor 14, WIFI chip 15, WIFI antenna 16, battery 17, video acquisition camera 101, ultra-light satellite portable station 102, pipeline monitoring station 103, natural gas pipeline 104.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The invention provides a natural gas pipeline fault monitoring device, as shown in figures 1-6, a gas pressure measuring assembly is arranged in a natural gas pipeline to be detected and is used for measuring whether the gas pressure value at a plurality of sections in the pipeline is abnormal when the pipeline conveys natural gas;
the wireless remote transmission assembly is arranged outside the natural gas pipeline to be detected, is in wireless connection with the air pressure measurement assembly, and is used for receiving abnormal pressure data existing in measurement, and sending fault alarm information, fault positioning coordinates and fault site pipeline pictures to the pipeline monitoring station 103 through a satellite communication link;
preferably, the air pressure measuring assembly comprises: the umbrella-shaped support frame comprises a plurality of umbrella-shaped supports 12, wherein the umbrella-shaped supports 12 are fixedly connected with one another to form an umbrella-shaped support frame 11, and sealing films 13 are adhered to the surfaces of two sides of the umbrella-shaped support frame 11; the sensor 14, the WIFI chip 15, the WIFI antenna 16 and the battery 17 are fixedly arranged in the bracket 12;
preferably, the wireless remote transmission assembly includes: a plurality of ultra-light satellite portable stations and a plurality of video acquisition cameras 101 fixedly installed on the outer wall of the pipeline;
the inside of the ultra-light satellite portable stations are provided with a Beidou positioning module and a WIFI access module;
preferably, the video acquisition camera 101 and the ultra-light satellite portable station are interconnected through a WIFI access module network;
the embodiment, as shown in fig. 1-7, comprises the following specific processes:
s1, placing a plurality of air pressure measuring assemblies in a natural gas pipeline, and connecting the air pressure measuring assemblies in the pipeline with a wireless remote transmission assembly outside the pipeline by WIFI;
s2, the air pressure measuring component transmits the abnormal value of the natural air pressure to the wireless remote transmission component through a WIFI signal;
specifications of common natural gas transmission pipelines: diameter 219mm-3620mm; therefore, umbrella-shaped supporting frames 11 with different diameters are formed by a plurality of brackets 12 with different lengths; the staff selects umbrella-shaped support frame 11 with the diameter equal to the inner diameter of the natural gas transmission pipeline to place in the pipeline, and sealing films 13 are adhered to the surfaces of the two sides of the umbrella-shaped support frame 11, so that the surface of the umbrella-shaped support frame 11 can travel in the direction of air flow by depending on the flowing force of natural gas when the natural gas in the pipe is conveyed.
In the advancing process of the umbrella-shaped supporting frame 11, the battery 17 supplies power to the sensor 14 and the WIFI chip 15 in the bracket 12, and the working sensor 14 can detect the air pressure value at a plurality of sections in the pipe; typically the normal pressure value inside a natural gas pipeline is 12 mpa, and when the difference between the pressure value of the natural gas in the pipe and the normal value of 12 mpa is greater than 1.2 mpa, the natural gas pipeline has developed a leak.
Thus, the sensor 14 is first parameter set, which refers to: the difference between the natural gas pressure value detected by the sensor 14 and the normal value of 12 mpa is set to be less than 1.2 mpa; when the natural gas pressure value detected by the sensor 14 is greater than 1.2 megapascals, the sensor 14 sends a signal to the WIFI chip 15; after the WIFI chip 15 receives the signal, the WIFI chip 15 reports the pressure abnormal value to the ultra-light satellite portable station which moves to the corresponding position of the umbrella-shaped support frame 11 through the WIFI antenna 16;
the pressure anomaly is calculated by the following three equations:
the continuous equation of natural gas velocity and pipeline length is:
；
the transfer momentum equation for natural gas is:
；
the equation for the state of natural gas pressure is:
；
wherein ,
for the length of the pipeline, q is the gas density, v is the gas velocity, Y is the natural gas pressure, A is the resistance density caused by the bending degree of the pipeline, r is the inner diameter of the natural gas pipeline, h is the gas constant, and the gas constant value is ∈ ->
T is the gas temperature, and the gas temperature takes the value of: 288.15K.
S3, acquiring coordinate information of the pressure abnormal point in real time by a Beidou positioning module carried by the wireless remote transmission assembly;
after the WIFI access module in the ultra-light satellite portable station receives the abnormal value, the ultra-light satellite portable station acquires coordinate information of a pipe section with abnormal pressure through the carried Beidou positioning module; the video acquisition camera 101 and the ultra-light satellite portable station are utilized to realize local network interconnection through the WIFI access module, and signals are sent to the video acquisition camera 101 closest to the abnormal pipe section; after receiving the signal, the video acquisition camera 101 shoots a fault pipe section; after shooting is completed, the shot picture is transmitted to the ultra-light satellite portable station through the WIFI access module.
S4, the wireless remote transmission component sends out fault alarm information, fault positioning coordinates and fault site pipeline pictures to the pipeline monitoring station 103 through a satellite communication link;
s5, after receiving the alarm information and the pipeline field picture, the pipeline monitoring station 103 selects to apply for establishing a video link with the wireless remote transmission assembly and observes the fault dynamics of the pipeline in real time;
the ultra-light satellite portable station firstly acquires satellite beacon signals to complete satellite pairing, and then establishes a narrow-band satellite communication link; the ultra-light satellite portable station can send out fault alarm information, fault positioning coordinates and fault pipe section pictures to the pipeline monitoring station 103 through a satellite communication link; wherein: the fault alarm information comprises abnormal pressure value in the natural gas pipe.
The pipeline monitoring station 103 is a monitoring platform for remotely positioning a natural gas pipeline fault point and remotely observing a fault pipeline section by a video as a maintainer;
after the pipe monitoring station 103 receives the alarm information and the pipe field picture, a maintainer judges the fault occurrence reason according to the picture, wherein the fault occurrence reason refers to: geological disasters, depreciation and damage, artificial damage and the like; and judging the emergency degree and the dangerous degree of the fault point according to the position information of the fault point, wherein the emergency degree and the dangerous degree refer to: whether the faulty pipe section is in a flammable environment; finally, the application and the video acquisition camera 101 can be selected to establish a video link, and the dynamic state of the fault pipe section can be observed in real time.
The distance between the ultra-light satellite portable stations can be 20m, 22 m, 26 m and 30m, so that the full coverage of the WIFI access signal outside the natural gas pipeline can be ensured, and the ultra-light satellite portable stations are used for performing WIFI connection with the WIFI chip 15 in the umbrella-shaped support frame 11 moving in the pipeline.
Judging the advancing state of the umbrella-shaped supporting frame 11 in the pipeline according to the intensity of the WIFI signal; the judging method comprises the following steps: when the natural air pressure is normal, the WIIF signal intensity connected between the WIFI chip 15 and the ultra-light satellite portable station is from weak to strong and from strong to weak, and the umbrella-shaped supporting frame 11 can be in a uniform speed running state in the pipeline. When the natural air pressure is abnormal, the WIIF signal intensity of the connection between the WIFI chip 15 and the ultra-light satellite portable station may irregularly change, and the umbrella-shaped support frame 11 may be stopped briefly or not in a uniform speed running state.
Performing cooperative connection switching of the WIFI access module according to movement of the umbrella-shaped support frame 11 in the pipeline; namely: the cooperative connection switching of the WIFI access module is carried out through the WIIF signal intensity connected between the WIFI chip 15 and the ultra-light satellite portable station; namely: the WIIF signal intensity of the previous connection between one ultra-light satellite portable station and the WIFI chip 15 gradually becomes weak, and when the WIIF signal intensity of the next connection between the ultra-light satellite portable station and the WIFI chip 15 gradually becomes strong, the WIFI chip 15 automatically switches to the ultra-light satellite portable station with strong signal.
The interval distance between the video acquisition cameras 101 is 50 m, 52 m, 56 m and 60m, so that the environment outside the natural gas pipeline is monitored in a full coverage mode, and pictures of each section of pipeline can be taken.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (8)
1. A natural gas pipeline fault monitoring device, the device comprising:
the gas pressure measuring component is placed in a natural gas pipeline to be detected and is used for measuring whether the gas pressure value of the natural gas at a plurality of sections in the pipeline is abnormal or not;
the wireless remote transmission assembly is arranged outside a natural gas pipeline to be detected and is in wireless connection with the air pressure measurement assembly, and is used for receiving abnormal pressure data existing in measurement and sending fault alarm information, fault positioning coordinates and fault site pipeline pictures to the pipeline monitoring station (103) through a satellite communication link.
2. A natural gas pipeline fault monitoring device as claimed in claim 1, wherein the gas pressure measurement assembly comprises: the umbrella-shaped support frame comprises a plurality of umbrella-shaped supports (12), wherein the umbrella-shaped supports (12) are fixedly connected with one another to form an umbrella-shaped support frame (11), and sealing films (13) are adhered to the surfaces of two sides of the umbrella-shaped support frame (11); the sensor (14), the WIFI chip (15), the WIFI antenna (16) and the battery (17) are arranged in the bracket (12).
3. A natural gas pipeline fault monitoring device according to claim 1, wherein the pressure anomaly is calculated by the following three equations:
the continuous equation of natural gas velocity and pipeline length is:
；
the transfer momentum equation for natural gas is:
；
the equation for the state of natural gas pressure is:
；
wherein ,
the length of the pipeline is q, the gas density, v, the gas speed, Y, the natural gas pressure, A, the resistance density caused by the bending degree of the pipeline, r, the inner diameter of the natural gas pipeline, h, the gas constant and T, the gas temperature.
4. A natural gas pipeline fault monitoring device as defined in claim 1, wherein the wireless remote transmission assembly comprises: a plurality of ultra-light satellite portable stations (102) and a plurality of video acquisition cameras (101) which are arranged on the outer wall of the pipeline;
and a plurality of ultra-light satellite portable stations (102) are internally provided with a Beidou positioning module and a WIFI access module.
5. A natural gas pipeline fault monitoring device according to claim 4, wherein a plurality of said ultra-light satellite portable stations (102) are installed at a separation distance of 20-30m.
6. A natural gas pipeline fault monitoring device according to claim 4, characterized in that a plurality of video capture cameras (101) are mounted at a separation distance of 50-60m.
7. The natural gas pipeline fault monitoring device according to claim 4, wherein the video acquisition camera (101) and the ultra-light satellite portable station (102) are interconnected by a WIFI access module network.
8. A natural gas pipeline fault monitoring method comprising the steps of:
s1, placing an air pressure measurement assembly in a natural gas pipeline, and connecting the air pressure measurement assembly in the pipeline with a wireless remote transmission assembly outside the pipeline by WIFI;
s2, the air pressure measuring component transmits the abnormal value of the natural air pressure to the wireless remote transmission component through a WIFI signal;
s3, acquiring coordinate information of the pressure abnormal point in real time by a Beidou positioning module carried by the wireless remote transmission assembly;
s4, the wireless remote transmission assembly sends out fault alarm information, fault positioning coordinates and fault site pipeline pictures to a pipeline monitoring station (103) through a satellite communication link;
and S5, after receiving the alarm information and the pipeline field picture, the pipeline monitoring station (103) selects to apply for establishing a video link with the wireless remote transmission assembly, and observes the pipeline fault dynamics in real time.
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